diff --git a/cpu/cc26xx-cc13xx/Makefile.cc26xx-cc13xx b/cpu/cc26xx-cc13xx/Makefile.cc26xx-cc13xx
index f6ac275da..40638e80e 100644
--- a/cpu/cc26xx-cc13xx/Makefile.cc26xx-cc13xx
+++ b/cpu/cc26xx-cc13xx/Makefile.cc26xx-cc13xx
@@ -68,7 +68,7 @@ CONTIKI_CPU_DIRS += ../arm/common/dbg-io
 
 ### CPU-dependent source files
 CONTIKI_CPU_SOURCEFILES += clock.c rtimer-arch.c soc-rtc.c uart.c
-CONTIKI_CPU_SOURCEFILES += contiki-watchdog.c
+CONTIKI_CPU_SOURCEFILES += contiki-watchdog.c aux-ctrl.c
 CONTIKI_CPU_SOURCEFILES += putchar.c ieee-addr.c batmon-sensor.c
 CONTIKI_CPU_SOURCEFILES += slip-arch.c slip.c cc26xx-uart.c lpm.c
 CONTIKI_CPU_SOURCEFILES += gpio-interrupt.c oscillators.c